#include<stdio.h>
#include<unistd.h>
#include<stdlib.h>

int main()
{
  while(1)
  {
    sleep(1);
    printf("hello!!\n");
  }
 /*
  pid_t id = fork();

  if(id==0)
  {
    //child
    int cnt =5;
    while(1)
    {
      printf("我是子进程，我还剩%d S\n",cnt--);
      sleep(1);
    }
    printf("我是子进程，我已经是僵尸了，等待被检测\n");
    exit(0);
  }
  else 
  {
    //father
    int cnt = 3;
    while(cnt)
    {
      printf("我是父进程，我：%d\n",cnt--);
      sleep(1);
    }
    exit(0);

  }
  */ 
  return 0;
}
